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How to Repair Hard Disk Drive at Home
While it is true that data loss is very traumatic, it will remain a distant worry until it happens to you. Then as the case usually is, you dive into frantic hard disk repair runs-ins and coupled with a walk down the repair shop, the truth about your misfortunes will only then begin to take shape.
It will be humbling to learn that all your precious photos, documents and audiovisual files are probably gone forever!
Amazing as this may be, many users actually forget the trauma and do not implement preemptive measures to ensure data loss does not happen again.
Perhaps an important reminder to reflect is that data is more expensive and precious than the disk drive onto which it is retained.
A few warnings that a disk drive is failing may include one or more of the following:
- Computer begins to slow down
- The operating system may sometimes fails to load
- Persistent blue screens
- The computer restarts randomly
- If the computer has more than one partition, the others suddenly disappear
- Some files fail to open or simply disappear
Of course, the above symptoms may happen because of other reasons; like bad memory modules, viruses, corrupted operating system files etc. Either way, you need to find out what is going on with your computer before trouble knocks at the door.
How to Check the Disk Drive for Failure
Before making hasty decisions regarding a hard disk gone south, make sure it is actually dead. Quite often, a false alarm will be sounded when something else is the matter.
Make use of the following tools to diagnose what is actually happening.
1. Use Hard Disk Sentinel to Assess Disk Drive Status
Hard Dist Sentinel is a MUST have utility for monitoring disk performance and health.
Hard disk sentinel will give you the correct assessment of your drive and warn you of impending doom. It continuously monitors and displays the health status of the drive.
Any score below 50% should be a sign that the drive needs replacement.
On second thought, a good disk drive should read 100%, Anything below that is a tell-tale sign that something is wrong.
Get worried if the percentage reads 0!
Hard Disk Sentinel is available for Windows and a bootable freeware version is bundled with the Hiren boot CD.
If the disk drive is not accessible because Windows is corrupted, run the Hard Disk Sentinel which is bundled inside the freeware HIREN boot CD.
Download a copy, burn it onto a cd or create a bootable version of the software using a flash drive.
Boot into the bootable CD or flash drive and seek out the DOS version of Hard Disk Sentinel. You should see something similar to the image below with details about performance and health of the disk drive.
2. Use Disk Management to Read Hidden Partitions
Windows inbuilt disk management tool will show you hidden partitions just in case a secondary hard disk or other partition goes missing. It could be a missing drive letter that is driving you into a frenzy i.e (C:) for Windows local drive.
To use Disk Management tool, type compmgmt.msc in Run and click Disk Management in the left pane. Any disk or partition that is missing a drive letter will show up, and you only have to right click it for Properties and then allot it an alphabetical letter.
3. Use SMART Status to Assess Disk Drive Health
Modern computers ship with SMART feature enabled within the BIOS, and Windows 8 operating system actually warns about a failing hard disk drive.
If SMART is not enabled in the CMOS setup, make sure it is and see if you receive warnings about hard disk health.
4. Check for Faults in the Data Cable
If software tools fail to see the disk drive, or it is on and off intermittently, maybe it is DIY time to make visual assessment of the disk drive and related parts inside the computer.
Make sure all data and power cables connect well to the disk drive and motherboard connectors. Assess both PATA and SATA cables depending on the drive type.
This especially so if the computer no longer sees the drive. Hard disks can develop erratic behavior when data or power cables attached to them are failing or the contacts on the board or the drives are blocked and contaminated by dust and corrosion.
The next step is to clean the contacts and corroded points on the circuit board and the cables. Further still, try other data and power cables and see if they make any difference.
5. Connect Disk Drive as Secondary Drive
If dirt and cabling are not the issue, pull out the hard disk and connect it as secondary disk or external disk onto the desktop or laptop.
If however, the external disk is the one you are troubleshooting, make sure to swap the USB cables just in case. Some USB cables don’t usually supply voltage enough to power up the drive.
Most external hard disks ship with Y USB cables and they require that both are plugged in. For better results when using the desktop computer, always plug the cables into the USB ports located at the rear of the system unit.
How to Implement Data Recovery
1. Software Recovery Using iCare
If confirmed that the hard disk is actually the culprit, take precautions not to power it up for long. Keep it cool in order to allow you transfer the data to another drive.
Dying mechanical drives get even weaker if subjected to rigorous testing. The hotter a dying hard disk gets, the further its health deteriorates.
Keep it cool until you have your data transferred elsewhere. Keeping cool may involve storing it in the freezer overnight!
Make sure to wrap it carefully inside a polythene bag before sticking it in the freezer. Overnight freezing should prep it for software recovery in the morning.
If direct data transfer to another disk drive is not yielding immediate results, don't try too hard by repeatedly turning it on and off. The further you stress this annoying little thing, the more you are ruining it.
In the event that the above steps have failed, you may now want to resort to data recovery using specialized software utilities. Software recovery tools are better at this time of the crisis.
Make sure the disk drive is cool enough before running the recovery software of your choice. I use iCare Data Recovery Software and it has bailed me out countless times.
Recovery software will take hours if your hard disk capacity is high and if its health status is very bad. You may want to do it in a cool environment and preferably overnight.
Other popular recovery software include, spinrite, recuva and Kroll Ontrack. Go for whatever serves you best.
2.Swap Disk drive Components
If however software recovery fails to do you justice you may want to try risky mission that involves opening up the hard disk.
Manual hard disk repair should be the last resort in data recovery. It is a point of no return and one you undertake knowing too well you may lose the drive and data forever.
Only do it when you don’t mind losing the data in the drive and when you know exactly what you are doing!
Manual hard disk repair usually involve swapping two common components:
- The printed circuit board (PCB)
- The platter assembly
Swap the Printed Circuit Board (PCB)
This procedure is only useful if you have confirmed that the circuit board is the problem and not the mechanics inside the drive.
Repair of PCB basically means swapping the dead PCB on the failed hard disk with another one from a working hard disk.
The details, including the BIOS firmware in the PCBs to be swapped must be similar to the original PCB!
The main symptom of a dead PCB is a totally silent hard disk. It is possible that power is not being transmitted through the board because of broken points or other reasons.
For broken points try to reflow them and see if the drive gets back to life.
Sometimes a blown transient voltage suppression (tvs) diode is the reason for drive breakdown. If testing proves so, simply unsolder it and reconnect the drive to the computer. Remember the diode is meant to regulate voltage to the drive and without it you are operating like a pirate in the seas!
Have you ever tried fixing a dead hard disk at home?
If so, were you successful?
There is a catch though when swapping PCB between drives.
Whereas swapping may happen without a hitch in older IDE disk drives, newer SATA models pose a challenge.
Newer PCBs contain unique Identifiers (ID) built into ROM chips, and worse still some have the IDs built into the main controller chip. (see illustration above)
The chips from the dead board (assuming they are not dead too) need to be transferred to the new PCB.
Whereas the ROM chips can be replaced and swapped between the PCB boards without much of a hustle (if you own a hot-air gun), swapping the controller chip needs more professional hand.
Swap the Disk Drive Platters
Swapping hard disk platters is even more cumbersome and risky. It is better done by professionals, but now that you have opted to do it yourself, so be it.
Rules of thumb:
- Change drive platters in a super clean room!
- Do not touch the inside of the platters!
- Do not touch the read/write heads!
- No spec of dirt should land on the platters!
- Replace everything as exactly and precisely as you found them!
As much as the PCB and platters are the usual suspects in drive failures, other components may as well have failed. They include the motor and the read/write head.
If you fail to recover data by opening the disk drive, then that is it. No room for data recovery should be open for you.
3. Consult Data Recovery Specialists
Data recovery specialists should always be your first choice when data failure is knocking at the door, and data therein is crucial. Call one or visit one as soon as hard disk trouble starts, and you have failed to transfer data from it, or recovery software tools have also failed.
Don’t wait until it is too late to visit one, and neither should you visit one after you have scattered the drive platters in your super clean room!